View Full Version : Crushed coral as biological filtration

09/29/2012, 06:05 AM
I want to use some crushed coral as my bio filter and am just wondering how it compares to good live rock. I will be using a fine pre filter to keep particle matter away from the crushed coral. How many pounds of crushed coral would you say would be equal to 1 pound of good live rock with regards to the bacteria content? Am I better off just using ceramic rings?